<template>
  <div class="side-menu-wrapper sp-menu">
    <slot></slot>
    <Menu ref="menu" v-show="!collapsed" :active-name="activeName" :open-names="openedNames" :accordion="accordion" :theme="theme" width="auto" @on-select="handleSelect">
      <template v-for="item in menuList">
        <template v-if="!item.meta.hideInMenu">
          <template v-if="item.children && item.children.length === 1">
            <side-menu-item v-if="showChildren(item)" :key="`menu-${item.name}`" :parent-item="item"></side-menu-item>
            <menu-item v-else :name="getNameOrHref(item, true)" :key="`menu-${item.children[0].name}`">
              <!-- <common-icon :type="item.children[0].icon || ''"/> -->
              <span>{{ showTitle(item.children[0]) }}</span>
            </menu-item>
          </template>
          <template v-else>
            <side-menu-item v-if="showChildren(item)" :key="`menu-${item.name}`" :parent-item="item"></side-menu-item>
            <menu-item v-else :name="getNameOrHref(item)" :key="`menu-${item.name}`">
              <!-- <common-icon :type="item.icon || ''"/> -->
              <span>{{ showTitle(item) }}</span>
            </menu-item>
          </template>
        </template>
      </template>
    </Menu>
    <div class="menu-collapsed" v-show="collapsed" :list="menuList">
      <template v-for="item in menuList">
        <template v-if="!item.meta.hideInMenu">
          <collapsed-menu v-if="item.children && item.children.length > 1" @on-click="handleSelect" hide-title :root-icon-size="rootIconSize" :icon-size="iconSize" :theme="theme" :parent-item="item" :key="`drop-menu-${item.name}`"></collapsed-menu>
          <Tooltip transfer v-else :content="showTitle(item.children && item.children[0] ? item.children[0] : item)" placement="right" :key="`drop-menu-${item.name}`">
            <a @click="handleSelect(getNameOrHref(item, true))" class="drop-menu-a" :style="{textAlign: 'center'}">
              <!-- <common-icon :size="rootIconSize" :color="textColor" :type="item.icon || (item.children && item.children[0].meta.icon)"/> -->
            </a>
          </Tooltip>
        </template>
      </template>
    </div>
  </div>
</template>
<script>
import SideMenuItem from './side-menu-item.vue'
import CollapsedMenu from './collapsed-menu.vue'
import { getUnion } from '@/libs/tools'
import { filterTree } from '@/libs/util'
import mixin from './mixin'

export default {
  name: 'SideMenu',
  mixins: [ mixin ],
  components: {
    SideMenuItem,
    CollapsedMenu
  },
  props: {
    menuList: {
      type: Array,
      default () {
        return []
      }
    },
    collapsed: {
      type: Boolean
    },
    theme: {
      type: String,
      default: 'dark'
    },
    rootIconSize: {
      type: Number,
      default: 20
    },
    iconSize: {
      type: Number,
      default: 16
    },
    accordion: Boolean,
    activeName: {
      type: String,
      default: ''
    },
    openNames: {
      type: Array,
      default: () => []
    }
  },
  data () {
    return {
      openedNames: []
    }
  },
  methods: {
    handleSelect (name) {
      // name为menu-item唯一标识
      this.$emit('on-select', name)
    },
    getOpenedNamesByActiveName (name) {
      // return this.$route.matched.map(item => item.name).filter(item => item !== name)
      return [...filterTree(this.menuList, name)]
    },
    updateOpenName (name) {
      if (name === this.$config.homeName) this.openedNames = []
      else this.openedNames = this.getOpenedNamesByActiveName(name)
    }
  },
  computed: {
    textColor () {
      return this.theme === 'dark' ? '#fff' : '#495060'
    }
  },
  watch: {
    activeName (name) {
      // let arr = [...filterTree(this.menuList, name)]
      // this.openedNames = this.getOpenedNamesByActiveName(name)
      if (this.accordion) this.openedNames = this.getOpenedNamesByActiveName(name)
      else this.openedNames = getUnion(this.openedNames, this.getOpenedNamesByActiveName(name))
    },
    openNames (newNames) {
      this.openedNames = newNames
    },
    openedNames (newVal) {
      this.$nextTick(() => {
        this.$refs.menu.updateOpened()
      })
    }
  },
  mounted () {
    // console.log(this.activeName)
    this.openedNames = getUnion(this.openedNames, this.getOpenedNamesByActiveName(this.activeName))
  }
}
</script>

<style lang="less">
@import './side-menu.less';
</style>
<style lang="stylus" scoped>
.sp-menu
  & >>> .ivu-menu-dark.ivu-menu-vertical
    .ivu-menu-submenu-title
      &:hover
        background rgba(255, 255, 255, .2) !important
    .ivu-menu-opened
      // background rgba(255, 255, 255, .2) !important
      background transparent
      .ivu-menu-submenu-title
        background rgba(255, 255, 255, .2) !important
</style>
